Anna Gristina was warned she could face deportation to her native Scotland. Photograph: Louis Lanzano/AP

A suburban mother of four charged with moonlighting as a multimillion-dollar madam pleaded guilty Tuesday to promoting prostitution.

The Scotland-born Anna Gristina made the plea in Manhattan court. The judge said she'll be sentenced November 20 to time served and probation as part of a plea deal. The judge warned she could also be deported.

She spent four months in jail before being released on $250,000 bond in June.

Prosecutors had said Gristina, who now lives in Monroe, had a roster of wealthy, well-placed clients and boasted of law-enforcement connections during 15 years in a business that made her millions. She had said she was merely starting a dating service.

She had been charged with a single count of promoting prostitution, stemming from a July 2011 tryst that authorities say she arranged involving two women and an undercover officer posing as a client.

Gristina was arrested February 22 as she left a friend's Morgan Stanley office after a fundraising meeting for her business, prosecutors said.

Gristina said in court papers that investigators told her they'd let her go if she gave them information about five men – not named in her filings, but described as a financier, an international banker and a member of a politically connected family, among others.